20881400

素因数分解:

$2^3\times 5^2\times {\mathrm{131}}^1\times {\mathrm{797}}^1$

素因数の和:944

約数の個数: 48

約数和(自身を含む): 48981240

約数和(自身を除く): 28099840

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 131, 200, 262, 524, 655, 797, 1048, 1310, 1594, 2620, 3188, 3275, 3985, 5240, 6376, 6550, 7970, 13100, 15940, 19925, 26200, 31880, 39850, 79700, 104407, 159400, 208814, 417628, 522035, 835256, 1044070, 2088140, 2610175, 4176280, 5220350, 10440700, 20881400]

約数ペア:

[(1, 20881400), (2, 10440700), (4, 5220350), (5, 4176280), (8, 2610175), (10, 2088140), (20, 1044070), (25, 835256), (40, 522035), (50, 417628), (100, 208814), (131, 159400), (200, 104407), (262, 79700), (524, 39850), (655, 31880), (797, 26200), (1048, 19925), (1310, 15940), (1594, 13100), (2620, 7970), (3188, 6550), (3275, 6376), (3985, 5240)]